NIR/blue light emission optimization of NaY1−(x+y)YbxF4:Tmy upconversion nanoparticles via Yb3+/Tm3+ dopant balancing

2018 ◽  
Vol 47 (26) ◽  
pp. 8629-8637 ◽  
Author(s):  
Ali Bagheri ◽  
Zheye Li ◽  
Cyrille Boyer ◽  
May Lim
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emission ◽  
Data Driven ◽  
Upconversion Nanoparticles ◽  
Effective Strategy ◽  
Blue Light Emission ◽  
Data Driven Approach ◽  
Upconversion Process

A data driven approach provides better understanding of the role of dopant balancing in the upconversion process and presents an effective strategy to enhance the optical properties of upconversion nanoparticles.

The critical role of the coordination sphere in the high-efficiency blue-light emission from aminopyrazine metal-organic polymers

2021 ◽  
Vol 186 ◽  
pp. 109025
Author(s):  
João Humberto Dias Campos ◽  
Meiry Edivirges Alvarenga ◽  
Maykon Alves Lemes ◽  
José Antônio do Nascimento Neto ◽  
Freddy Fernandes Guimarães ◽  
...  
Keyword(s):  
Blue Light ◽  
Coordination Sphere ◽  
High Efficiency ◽  
Light Emission ◽  
Critical Role ◽  
Organic Polymers ◽  
Blue Light Emission ◽  
Metal Organic

Effects of Eu2+ substitution on structural and optical properties with blue light emission in pollucite CsAlSi2O6 phosphor

2021 ◽  
Vol 232 ◽  
pp. 117846
Author(s):  
Seiya Shimono ◽  
Koki Yoshimoto ◽  
Yuta Ueda ◽  
Yasushi Nanai ◽  
Hiroaki Kishimura ◽  
...  
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emission ◽  
Structural And Optical Properties ◽  
Blue Light Emission

scholarly journals Transkingdom interactions between Lactobacilli and hepatic mitochondria attenuate western diet-induced diabetes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Richard R. Rodrigues ◽  
Manoj Gurung ◽  
Zhipeng Li ◽  
Manuel García-Jaramillo ◽  
Renee Greer ◽  
...  
Keyword(s):  
Functional Role ◽  
Reduced Glutathione ◽  
Western Diet ◽  
Data Driven ◽  
Data Driven Approach ◽  
Probiotic Strains ◽  
Host Metabolism ◽  
Harmful Effects

AbstractWestern diet (WD) is one of the major culprits of metabolic disease including type 2 diabetes (T2D) with gut microbiota playing an important role in modulating effects of the diet. Herein, we use a data-driven approach (Transkingdom Network analysis) to model host-microbiome interactions under WD to infer which members of microbiota contribute to the altered host metabolism. Interrogation of this network pointed to taxa with potential beneficial or harmful effects on host’s metabolism. We then validate the functional role of the predicted bacteria in regulating metabolism and show that they act via different host pathways. Our gene expression and electron microscopy studies show that two species from Lactobacillus genus act upon mitochondria in the liver leading to the improvement of lipid metabolism. Metabolomics analyses revealed that reduced glutathione may mediate these effects. Our study identifies potential probiotic strains for T2D and provides important insights into mechanisms of their action.

Enhanced blue-light emission on Cd0.9-xZn0.1CrxS(0 ≤ x ≤ 0.05) quantum dots

2019 ◽  
Vol 45 (3) ◽  
pp. 3833-3838 ◽  
Author(s):  
I. Devadoss ◽  
P. Sakthivel ◽  
S. Muthukumaran ◽  
N. Sudhakar
Keyword(s):  
Quantum Dots ◽  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission

LUMINESCENCE BEHAVIOR AND MECHANISM OF LIGHT-EMITTING POROUS SILICON

1994 ◽  
Vol 08 (02) ◽  
pp. 69-92 ◽  
Author(s):  
XUN WANG
Keyword(s):  
Porous Silicon ◽  
Blue Light ◽  
Light Emission ◽  
Energy State ◽  
Surface Recombination Velocity ◽  
Luminescence Spectroscopy ◽  
Carrier Injection ◽  
Blue Light Emission ◽  
Light Emitting ◽  
Si Nanostructures

In this review article, we give a new insight into the luminescence mechanism of porous silicon. First, we observed a “pinning” characteristic of photoluminescent peaks for as-etched porous silicon samples. It was explained as resulting from the discontinuous variation of the size of Si nanostructures, i.e. the size quantization. A tight-binding calculation of the energy band gap widening versus the dimension of nanoscale Si based on the closed-shell Si cluster model agrees well with the experimental observations. Second, the blue-light emission from porous silicon was achieved by using boiling water treatment. By investigating the luminescence micrographic images and the decaying behaviors of PL spectra, it has been shown that the blue-light emission is believed to be originated from the porous silicon skeleton rather than the surface contaminations. The conditions for achieving blue light need proper size of Si nanostructures, low-surface recombination velocity, and mechanically strong skeleton. The fulfillment of these conditions simultaneously is possible but rather critical. Third, the exciton dynamics in light-emitting porous silicon is studied by using the temperature-dependent and picosecond time-resolved luminescence spectroscopy. A direct evidence of the existence of confined excitons induced by the quantum size effect has been revealed. Two excitation states are found to be responsible for the visible light emission, i.e. a higher lying energy state corresponding to the confined excitons in Si nanostructures and a lower lying state related with surfaces of Si wires or dots. A picture of the carrier transfer between the quantum confined state and the surface localized state has been proposed. Finally, we investigated the transient electroluminescence behaviors of Au/porous silicon/Si/Al structure and found it is very similar to that of an ordinary p-n junction light-emitting diode. The mechanism of electroluminescence is explained as the carrier injection through the Au/porous silicon Schotky barrier and the porous silicon/p-Si heterojunction into the corrugated Si wires, where the radiative recombination of carriers occurs.

scholarly journals The fabrication of nc-Si/SiO2 multilayers and blue-light emission

2003 ◽  
Vol 52 (4) ◽  
pp. 989
Author(s):  
Sui Yan-Ping ◽  
Ma Zhong-Yuan ◽  
Chen Kun-Ji ◽  
Li Wei ◽  
Xu Jun ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emission ◽  
Blue Light Emission

scholarly journals Red, White and Blue Light Emission from Europium Doped Al2O3 Confined into a Silica Matrix

2018 ◽  
Vol 08 (08) ◽  
pp. 338-345 ◽  
Author(s):  
Joan Reyes ◽  
Dulce Y. Medina ◽  
Miriam Aguilar ◽  
Miguel A. Barron ◽  
Elizabeth Garfias ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emission ◽  
Silica Matrix ◽  
Blue Light Emission
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